CVE-2026-55794: Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code

unknownCVE-2026-55794

Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via renderObjectTemplate(), and while a sandboxed alternative already exists (renderSandboxedObjectTemplate()), it is not used in this case. This signed URL can be specified by users, as it is reflected in the “Referer” HTTP request header, which is under attacker control. This issue has been fixed in version 5.10.0.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: unknown
Published: 2026-07-02
Last updated: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-55794

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-557940.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55794	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highGHSA-f74w-488g-8x5r: Craft CMS: Potential authenticated Remote Code Execution via referrer redirectghsa

Recent advisories for Craft CMS is

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highGHSA-86vw-x4ww-x467: Craft CMS: RCE via missing cleanseConfig in FieldsController::actionRenderCardPreviewghsa · 2026-07-09
lowGHSA-c43v-4cr8-6mvp: Craft CMS has authenticated path traversal in `assets/icon`, allowing local `.svg` file r…ghsa · 2026-07-09
highGHSA-f74w-488g-8x5r: Craft CMS: Potential authenticated Remote Code Execution via referrer redirectghsa · 2026-07-06
mediumGHSA-xrqc-p465-2xvg: Craft CMS: Stored XSS via Structure entry title in table viewghsa · 2026-07-06
mediumGHSA-287w-mxq6-x2cp: Craft CMS: Sensitive File Disclosure / Server-Side File Readghsa · 2026-07-06
highGHSA-24x4-j6x9-rfw5: Craft CMS: DOM XSS via GitHub issue title in CraftSupport widgetghsa · 2026-07-06